- vestibular hallucination
- Also referred to as vestibular aura, vestibular illusion, and vertiginous hallucination. The term vestibular hallucination refers to the vestibular organ, a term which is indebted to the Latin noun vestibulum (forecourt, entrance hall). It is used to denote a hallucinated type of vertigo, which may consist of such diverse sensations as dizziness, disequilibrium, light-headedness, and feelings of floating or falling. As the German psychiatrist and neurologist Georg Theodor Ziehen (1862-1950) maintains, "By means of the vestibu-lar nerve we experience the position of our head in space. In this sensory area, too, hallucinations can occur: the diseased person feels how he is suddenly tossed into the air, how he is turned to the right or to the left, and so on." Vertigo occurring in the context of epilepsy has been reported at least since the 18th century. It is open to debate whether a distinction between 'true' vertigo and a 'hallucinated' type of vertigo can be made on phenomenological grounds, since vertigo has itself been traditionally conceptualized as a hallucinated feeling of disequilibrium, dizziness, or movement. A more fundamental objection to the concept of the vestibular hallucination stems from the argument that a subjective experience such as vertigo can never be imagined or 'unreal'. In philosophy this is known as the self-intimating aspect of sensory experiences. On the other hand, it would seem defendable to suggest that feelings of vertigo mediated by the vestibulo-cortical tracts or the temporal lobe's vestibular field, for example, are etiologically different from vertigo due to vestibular or ocular disturbances and that the former might therefore be set apart as a 'central' or 'hallucinated' variant of the latter. Moreover, it has been suggested that centrally mediated vertigo tends to consist of 'pure' vertigo, in contradistinction to labyrinthine vertigo, which is more often accompanied by nystagmus and vegetative symptoms such as nausea and perspiration. Pathophysiologically, vestibular hallucinations are associated primarily with aberrant neuronal discharges in the middle and posterior gyrus temporalis superior and with such discharges in or around the sulcus interparietalis. Vestibular hallucinations occurring in the context of epilepsy are traditionally referred to as a vertiginous seizure, vestibular seizure, or vertigo epileptica. A syndrome involving vestibular hallucinations, complex involuntary movements, and * scenic hallucinations is known as Zingerle syndrome or * Zingerle's automatosis.ReferencesBehrmann, S., Wyke, B.D. (1958). Vestibulo-genic seizures. A consideration of vertiginous seizures, with particular reference to convulsions produced by stimulation of labyrinthine receptors. Brain, 81, 529-541.Karbowski, K. (1982). Auditive und vestibuläre Halluzinationen.In: Halluzinationen bei Epilepsien und ihre Differentialdiagnose. Edited by Karbowski, K. Bern: Verlag Hans Huber.Ziehen, Th. (1911). Psychiatrie. Für Ärzte und Studierende bearbeitet. Vierte, vollständig umgearbeitete Auflage. Leipzig: Verlag von S. Hirzel.
Dictionary of Hallucinations. J.D. Blom. 2010.
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vestibular aura — see vestibular hallucination … Dictionary of Hallucinations
vestibular illusion — see vestibular hallucination … Dictionary of Hallucinations
vestibular-motor hallucination — The term vestibular motor hallucination is indebted to the Latin words vestibulum (forecourt, entrance hall) and motio (movement). It is used to denote a cluster of spatial, temporal, and orientational *hallucinoid experiences that may occur… … Dictionary of Hallucinations
vestibular hallucinatory state — Also referred to as vestibularly evoked visual hallucination. Both terms refer to the vestibu lar organ, a term which is indebted to the Latin noun vestibulum (forecourt, entrance hall). They areusedtodenotea * simple or * geometric visual… … Dictionary of Hallucinations
vertiginous hallucination — see vestibular hallucination … Dictionary of Hallucinations
simple hallucination — Also referred to as elementary hallucination. Both terms are used to denote a hallucination of the lowest degree of complexity. In the auditory modality, simple hallucinations are known as * akoasms. Common examples of akoasms are clicking… … Dictionary of Hallucinations
kinaesthetic hallucination — Also known as kinesthetic hallucination, kinaesthetic illusion, and hallucination of motion. The term kinaesthetic hallucination is indebted to the Greek words kinèsis (movement) and aisthèsis (feeling). In a broad sense, it is used to denote… … Dictionary of Hallucinations
vestibularly evoked visual hallucination — see vestibular hallucinatory state … Dictionary of Hallucinations
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Tullio phenomenon — The eponym Tullio phenomenon refers to the Italian physiologist Pietro Tullio (1881 1941), who is credited with having been the first to describe the physiological correlate of a rare syndrome in which vestibular signs and symptoms are… … Dictionary of Hallucinations